Multiple input multiplexing connection apparatus and method

G - Physics – 08 – B

Patent

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G08B 21/00 (2006.01) B60L 1/00 (2006.01) B60R 16/02 (2006.01) H01B 7/30 (2006.01) H02H 3/00 (2006.01) H02H 9/00 (2006.01)

Patent

CA 2463932

A connection system (10) for communicating multiple signals between a steering wheel (16) and a steering column (22) of a vehicle over a single wire (24) is provided that uses time division to multiplex multiple signals. A plurality of signals are multiplexed together ranging from two to as many signals as desired. Input switches (32, 34) are grouped together to form a ladder multiplexer, such as a resistive multiplexer (28, 30), that includes voltage and current muxing. A plurality of ladder multiplexers are joined together in a time division multiplexing scheme that operates continuously. An analog line may be added as a single channel. A marker pulse is used to signal the start of each time window to be divided for all the channels. Time division multiplexing is provided by a number of switching means.

L'invention concerne un système de connexion (10) destiné à la transmission de plusieurs signaux entre un volant (16) et une colonne de direction (22) d'un véhicule, par un câble (24), et au multiplexage par répartition dans le temps de plusieurs signaux. Ce système permet de multiplexer au moins deux signaux. Ce système comprend des commutateurs d'entrée (32, 34) regroupés pour former un multiplexeur en échelle, tel qu'un multiplexeur résistif (28, 30), à multiplexage de tension et de courant. Ce système comprend une pluralité de multiplexeurs en échelle reliés selon un schéma de multiplexage par répartition dans le temps, en continu. Une ligne analogique peut être ajoutée pour former un canal unique. Ce système utilise une impulsion au marqueur pour signaler le début de chaque fenêtre temporelle à diviser, pour chaque canal. Le multiplexage par répartition dans le temps est obtenu à l'aide de plusieurs commutateurs.

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